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Britannica Concise Encyclopedia

Britannica Concise Encyclopedia, published by Encyclopædia Britannica, Inc.
The Britannica Concise Encyclopedia, a condensed version of the Encyclopædia Britannica, offers short, concise, easy-to-read entries on everything from art and zoology to current events and history. Includes statistics, charts, maps and flags.
On this page: opuntia to Origen.
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Title Index: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0-9
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Opus Dei (Roman Catholic prelature)
oracle (ancient religion, ancient Greece)
Oran (city, Algeria)
orange (in botany)
Orange Free State (province and historical region)
Orange River (river, Africa)
Orange, house of (Modern Europe)
orangutan (primate)
Oranjestad (capital, Aruba)
oratorio (in music)
Orbison, Roy (Country Singer / Songwriter/ Rock Musician)
Orcagna, Andrea (Italian painter, sculptor & architect)
orchid (flower, herb)
Orchomenus (ancient city, ancient Greece)
ordeal (in law)
order in council (government, England)
ore (mineral)
oregano (herb, plant)
Oregon (state, United States)
Oregon Question (U.S. History)
Oregon Trail (road, United States)
Orestes (Roman general)
Orff, Carl (German composer & educator)
organ (instrument)
organic farming (in agriculture)
organum (in music)
Orhon River (Central Asia)
oriel (part of structure)
Orient Express (legendary luxury train)
orientation (in architecture)
Origen (Egyptian philosopher & scholar)